Who hacked Sarah's email? And who is rubicon10?

So, there was this post (deleted) on the 4chan.org /b/ board by rubico, which claimed responsibility for the break-in (warning: bad language ahead), via Michelle Malkin:rubico 09/17/08(Wed)12:57:22 No.

So, there was this post (deleted) on the 4chan.org /b/ board by rubico, which claimed responsibility for the break-in (warning: bad language ahead), via Michelle Malkin:

rubico 09/17/08(Wed)12:57:22 No.85782652

Hello, /b/ as many of you might already know, last night sarah palin’s yahoo was “hacked” and caps were posted on /b/, i am the lurker who did it, and i would like to tell the story.

In the past couple days news had come to light about palin using a yahoo mail account, it was in news stories and such, a thread was started full of newfags trying to do something that would not get this off the ground, for the next 2 hours the acct was locked from password recovery presumably from all this bullshit spamming.

after the password recovery was reenabled, it took seriously 45 mins on wikipedia and google to find the info, Birthday? 15 seconds on wikipedia, zip code? well she had always been from wasilla, and it only has 2 zip codes (thanks online postal service!)

the second was somewhat harder, the question was “where did you meet your spouse?” did some research, and apparently she had eloped with mister palin after college, if youll look on some of the screenshits that I took and other fellow anon have so graciously put on photobucket you will see the google search for “palin eloped” or some such in one of the tabs.

I found out later though more research that they met at high school, so I did variations of that, high, high school, eventually hit on “Wasilla high” I promptly changed the password to popcorn and took a cold shower…

And a minute later, this:
rubico 09/17/08(Wed)12:58:04 No.85782727

this is all verifiable if some anal /b/tard wants to think Im a troll, and there isn’t any hard proof to the contrary, but anyone who had followed the thread from the beginning to the 404 will know I probably am not, the picture I posted this topic with is the same one as the original thread.

I read though the emails… ALL OF THEM… before I posted, and what I concluded was anticlimactic, there was nothing there, nothing incriminating, nothing that would derail her campaign as I had hoped, all I saw was personal stuff, some clerical stuff from when she was governor…. And pictures of her family

I then started a topic on /b/, peeps asked for pics or gtfo and I obliged, then it started to get big

Earlier it was just some prank to me, I really wanted to get something incriminating which I was sure there would be, just like all of you anon out there that you think there was some missed opportunity of glory, well there WAS NOTHING, I read everything, every little blackberry confirmation… all the pictures, and there was nothing, and it finally set in, THIS internet was serious business, yes I was behind a proxy, only one, if this shit ever got to the FBI I was fucked, I panicked, i still wanted the stuff out there but I didn’t know how to rapidshit all that stuff, so I posted the pass on /b/, and then promptly deleted everything, and unplugged my internet and just sat there in a comatose state

Then the white knight fucker came along, and did it in for everyone, I trusted /b/ with that email password, I had gotten done what I could do well, then passed the torch , all to be let down by the douchebaggery, good job /b/, this is why we cant have nice things.

So do you buy this claim? Ars Technica doesn't:
The post was made under the handle "rubico," and linked to a similar e-mail address. Through a bit of Google searching, it is trivial to link that handle and e-mail to a real person—a student with ties to state-level Democratic politics. And while it is not entirely out of the realm of possibility, it does strain credibility somewhat to think that, after committing the most publicized computer intrusion in recent memory, the perpetrator would effectively return to the scene to deliver a signed confession. Equally possible, then, is that either the real hacker or an unrelated party with an active imagination decided to play a prank on the student in question.